Triangle read by rows: T(n,m) = number of T_0-multigraphs with n edges and m vertices(n>=2, 3<=m<=2*n).

A093855

Triangle read by rows: T(n,m) = number of T_0-multigraphs with n edges and m vertices(n>=2, 3<=m<=2*n).

Terms

    a(0) =3a(1) =12a(2) =7a(3) =44a(4) =80a(5) =0a(6) =12a(7) =111a(8) =440a(9) =840a(10) =630a(11) =0a(12) =18a(13) =234a(14) =1532a(15) =6048a(16) =13692a(17) =13440a(18) =0a(19) =0a(20) =25a(21) =441a(22) =4270a(23) =26740a(24) =106792a(25) =248696a(26) =277200a(27) =75600a(28) =0a(29) =0

External references